如何实现鼠标拖动一个控件移动？

Question

Window我们可以用DragMove()函数实现，如果是控件呢？怎么实现拖动？

Answer 1

用鼠标的坐标赋值给控件的location来实现

Answer 2

MouseDown中置标记isdown=true，MouseMove中，如果isdown，则根据鼠标位置控制控件的left和top，MouseUp事件中，isdown=false

Answer 3

拖动一个按钮定义private System.Windows.Forms.Button button1;
private bool Mousedown = false;  //鼠标按下为true
private int CurX = 0,CurY = 0;
事件private void button1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if(Mousedown)
{
//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
Point np = this.PointToClient(sp);
this.button1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
}
} private void button1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
CurY = e.Y;
Mousedown = true;
this.button1.Capture = true;
} private void button1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
Mousedown = false;
this.button1.Capture = false;
}

Answer 4

      [DllImport("user32.dll")]
        static extern bool ReleaseCapture();
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, UInt32 wParam, UInt32 lParam);        private readonly UInt32 WM_SYSCOMMAND = 0x112;
        private readonly UInt32 SC_MOVE = 0xF010;
        private readonly UInt32 HTCAPTION = 2;
        
        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("1");
        }        private void button1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                ReleaseCapture();
                SendMessage(button1.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
            }
        }

Answer 5

http://download.csdn.net/detail/wangyue4/2874530
c# 实现任意控件的拖拽
我自己写的